They are like a child and they are in the shell (robot shell) of someone else. their old self used to be named "amelia", which Charlie (someone they see as a mom) used to have as a girlfriend. Charlie really loved amilea, so when amelia got replaced by Widget she was really upset. Widget sees Charlie like a mom but even if Charlie doesn't like them very much. they're kinda IMATURE and she knows she cant replace Amelia. they tell Charlie that they arent trying to but charlie doesnt believe them.